Lap-weld and method of producing same.



J. H. PLOEHN. LAP WELD AND METHOD OF PRODUCING SAME,

APPLICATION FILED JULY 6.1916.

1,952,025,, Patented Jan. 1,1918;

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JOHN H. PLOEHN, OF DAVENPORT, .IOWA, ASSIGNOR TO G. WATSON FRENCH,NATHANIEL FRENGH,'JOSEPH L. HEIGHT, AND W. H. STACKHOUSE, ALL OFDAVENPORT, IOWA, COMlOSING THE FIRM OF FRENCH & HECHT, 0F DAVEN- PORT,IOWA.

Application filed July 6, 1916. Serial No. 107,747.

To all whom it may concern:

Be it known that I, JOHN H. Pnonnn, a

citizen of the United States, residing at,

Davenport, in the county of Scott and State of Iowa,have inventedcertain new and useful Improvements in Lap-Welds and Methods ofProducing Same, of which the fol- .lowing is a specification, referencebeing had therein to the accompanying drawing.

This invention relates to the method of welding and is applicable moreparticularly to the lap welding of sheets, plates, wheel rims and thelike.

In lap welding wide sheets or plates under the commonly'practisedmethods, difliculty is encountered in producing a smooth and uniformunion of the parts, which difficulty increases as the width of theplates increases.

It is the common practice in welding such wide plates, to effect theweld in two opera tions, successively on opposite sides of the center.This operation results in a distorted or uneven portion at thetermination of the first weld, and when the second .weld is effected afurther unevenness and distortion takes place, the result of'which isthe production of an. objectionable and uneven ,union, with the doublethickness of the metal of the weld unevenly distributed, and the weld inmany cases much thicker at the centerthan at the sides;

It is the aim of my invention to avoid this objectionable action and toeffect a welded union of the parts which will be even and regular and ofuniform thickness throughout, and with this end in 'view my inventionconsists in so controlling the flow of the metal under the weldingpressure, that the double thickness of the overlap will be permitted tobe distributed without causing distorted or uneven portions in the weld.Such control of the flow of the metal may be brought about by formingin; one or both of the ends of the parts to be joined, a relief cavityor cavities in which themetal under the action of the welding pressure,will be displaced and thereby controlled in its flow and distributedevenly throughout the weld.

The invention also consists in the improved union or weld resulting fromsaid method.

In thc'accompanying. Figure portions of two plates to be welded, thesedrawings Specification of Letters Patent.

'1 is a plan view of the terminal LAP-WELD AND METHOD 0F PRODUCING SAME.

Patented Jan. 1, 1918..

plates in the present case being the ends of a wheel rim, and one of theends being pro vided with a relief cavity.

Fig. 2 is a similar view showing the ends overlapped preparatory to thewelding operation. v

Fig. 3 is a side elevation of the same.

Fig. l is a plan view showing the completed weld.

Fig. 5 is a side elevation of the same.

Fig. 6 is a plan View similar to Fig.1 but showing a relief cavity ineach of the rim ends.

In carrying my method into practice, one

'of the two rim ends A and B as shown in Fig. 1 is provided near itscentral portion with a relief cavity 0, and the two ends are overlappedas shown in Fig. 2 and are then, after being previously heated to awelding temperature, subjected by suitable means to.

a welding pressure to cause the overlapping ends to be welded togetherand united. lfhe result of the welding pressure will be to reduce thethickness of the metal 'of the joint, which'metal will be caused to flowinwardly toward the relief cavity and be distributed and displacedtherein, resulting in a welded joint of uniform thickness as shown inFig. 5, the relief cavity being contracted as shown in Fig. 4 due to thedisplacement and flow better joint may therefore be formed withcorrespondingly reduced labor. The welding pressure to unite the parts,may be applied throughout the width of the plates in one operation, butit is preferable to effect the operation in two steps, first on one'sideof the cavity and then on the other side. Asshown in Fig. be formed inboth of the ends instead of in only one as shown in Fig. 1.

While l have illustrated my invention. as applicable to the welding ofthe ends of 6 the relief cavity may metal wheel rims, it will heunderstood that it is not restricted in this connection and may heapplied for joining plates or sheets and other parts; and it will hefurther understood that the invention is not limited, either in respectto the method or the article produced thereby, exceptin so far as suchlimitations are specified in the claims.

Having thus described my invention, What I claim is:

1. The method of welding the ends of sheets or plates, which consists inbringing the same into welding relations to each other, subjecting saidends, previously heated, to a Welding operation to cause the metal toflow and unite said ends, and controlling said flow of the metal toevenly distribute the same in the weld.

2. The method of lap welding the ends of sheets or plates, whichconsists in forming in. one of the ends to be welded a relief cavity tocontrol the flow of the metal of the weld, overlapping said ends, andsubjectin the overlapping ends, previously heater, to a welding pressureto unite them.

The method of lap welding the ends of sheets or plates, which consistsin forming in one of the ends to be Welded a relief cavity to controlthe fiow of the metal of the weld, overlapping said ends, and sub--jecting the overlapping ends at opposite sides of the relief cavity,while heated, successively to welding pressures to unite them.

. 4E. The method of lap welding the ends of sheets or plates, whichconsists in forming relief cavities in the ends to bewelded to controlthe flow of the metal of the Weld, overlapping said. ends, and applyingto the overlapping ends, while heated, a Welding ity in which the metalof the weld is dis-.

tributed.

7. A wheel rim having its ends overlapped and welded together andprovided with a cavity in which the metal of the Weld is distributed.

In testimony whereof, I have afiixed my signature in presence of twowitnesses.

JOHN H. PLOEHN. Witnesses:

ANDREW NEILsoN, S. L. SAMPLE.

